We are being asked to calculate the contributions to [H3O+] from each ionization step in H2A.
• can donate two protons (H+) → diprotic acid
• two equilibrium equations → two equilibrium constants
• Equilibrium constants (Ka) given:
▪ Ka1 = 1.0x10-4
▪ Ka2 = 5.0x10-5
Construct an ICE Chart for the 1st equilibrium reaction:
Consider a 0.10 M solution of a weak polyprotic acid (H2 A) with the possible values of Ka1 and Ka2 given below. Calculate the contributions to [H3O+] from each ionization step.
Ka1 = 1.0x10 - 4 ; Ka2 = 5.0x10 - 5
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Diprotic Acid concept. You can view video lessons to learn Diprotic Acid. Or if you need more Diprotic Acid practice, you can also practice Diprotic Acid practice problems.
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